[PATCH v3 30/56] drm/omap: dsi: move panel refresh function to host

Tomi Valkeinen
2020-11-05T12:05:19Z

From: Sebastian Reichel <sebastian.reichel@collabora.com>

This moves the panel refresh/update function from the panel
driver into the DSI host driver to prepare for common drm_panel
support.

Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
.../gpu/drm/omapdrm/displays/panel-dsi-cm.c | 68 ------------
drivers/gpu/drm/omapdrm/dss/dsi.c | 101 ++++++++++++++++--
drivers/gpu/drm/omapdrm/dss/omapdss.h | 13 +--
drivers/gpu/drm/omapdrm/omap_crtc.c | 11 +-
4 files changed, 97 insertions(+), 96 deletions(-)

diff --git a/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c b/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c
index 030a8fa140db..1582960f9e90 100644
--- a/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c
+++ b/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c
@@ -177,27 +177,6 @@ static int dsicm_get_id(struct panel_drv_data *ddata, u8 *id1, u8 *id2, u8 *id3)
return 0;
}

-static int dsicm_set_update_window(struct panel_drv_data *ddata,
- u16 x, u16 y, u16 w, u16 h)
-{
- struct mipi_dsi_device *dsi = ddata->dsi;
- int r;
- u16 x1 = x;
- u16 x2 = x + w - 1;
- u16 y1 = y;
- u16 y2 = y + h - 1;
-
- r = mipi_dsi_dcs_set_column_address(dsi, x1, x2);
- if (r < 0)
- return r;
-
- r = mipi_dsi_dcs_set_page_address(dsi, y1, y2);
- if (r < 0)
- return r;
-
- return 0;
-}
-
static int dsicm_bl_update_status(struct backlight_device *dev)
{
struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
@@ -470,48 +449,6 @@ static void dsicm_disable(struct omap_dss_device *dssdev)
mutex_unlock(&ddata->lock);
}

-static void dsicm_framedone_cb(int err, void *data)
-{
- struct panel_drv_data *ddata = data;
-
- dev_dbg(&ddata->dsi->dev, "framedone, err %d\n", err);
- mutex_unlock(&ddata->lock);
-}
-
-static int dsicm_update(struct omap_dss_device *dssdev,
- u16 x, u16 y, u16 w, u16 h)
-{
- struct panel_drv_data *ddata = to_panel_data(dssdev);
- struct omap_dss_device *src = ddata->src;
- int r;
-
- dev_dbg(&ddata->dsi->dev, "update %d, %d, %d x %d\n", x, y, w, h);
-
- mutex_lock(&ddata->lock);
-
- if (!ddata->enabled) {
- r = 0;
- goto err;
- }
-
- /* XXX no need to send this every frame, but dsi break if not done */
- r = dsicm_set_update_window(ddata, 0, 0, ddata->vm.hactive,
- ddata->vm.vactive);
- if (r)
- goto err;
-
- r = src->ops->dsi.update(src, ddata->dsi->channel, dsicm_framedone_cb,
- ddata);
- if (r)
- goto err;
-
- /* note: no unlock here. unlock is src framedone_cb */
- return 0;
-err:
- mutex_unlock(&ddata->lock);
- return r;
-}
-
static int _dsicm_enable_te(struct panel_drv_data *ddata, bool enable)
{
struct mipi_dsi_device *dsi = ddata->dsi;
@@ -572,10 +509,6 @@ static const struct omap_dss_device_ops dsicm_ops = {
.check_timings = dsicm_check_timings,
};

-static const struct omap_dss_driver dsicm_dss_driver = {
- .update = dsicm_update,
-};
-
static int dsicm_probe_of(struct mipi_dsi_device *dsi)
{
struct device_node *node = dsi->dev.of_node;
@@ -658,7 +591,6 @@ static int dsicm_probe(struct mipi_dsi_device *dsi)
dssdev = &ddata->dssdev;
dssdev->dev = dev;
dssdev->ops = &dsicm_ops;
- dssdev->driver = &dsicm_dss_driver;
dssdev->type = OMAP_DISPLAY_TYPE_DSI;
dssdev->display = true;
dssdev->owner = THIS_MODULE;
diff --git a/drivers/gpu/drm/omapdrm/dss/dsi.c b/drivers/gpu/drm/omapdrm/dss/dsi.c
index 0f264654792d..0aa0d21cf896 100644
--- a/drivers/gpu/drm/omapdrm/dss/dsi.c
+++ b/drivers/gpu/drm/omapdrm/dss/dsi.c
@@ -214,6 +214,9 @@ static void dsi_display_uninit_dispc(struct dsi_data *dsi);

static int dsi_vc_send_null(struct dsi_data *dsi, int channel);

+static ssize_t _omap_dsi_host_transfer(struct dsi_data *dsi,
+ const struct mipi_dsi_msg *msg);
+
/* DSI PLL HSDIV indices */
#define HSDIV_DISPC 0
#define HSDIV_DSI 1
@@ -383,9 +386,6 @@ struct dsi_data {

struct delayed_work ulps_work;

- void (*framedone_callback)(int, void *);
- void *framedone_data;
-
struct delayed_work framedone_timeout_work;

#ifdef DSI_CATCH_MISSING_TE
@@ -3802,8 +3802,6 @@ static void dsi_handle_framedone(struct dsi_data *dsi, int error)
dsi_set_ulps_auto(dsi, true);
dsi_bus_unlock(dsi);

- dsi->framedone_callback(error, dsi->framedone_data);
-
if (!error)
dsi_perf_show(dsi, "DISPC");
}
@@ -3835,6 +3833,8 @@ static void dsi_framedone_irq_callback(void *data)

cancel_delayed_work(&dsi->framedone_timeout_work);

+ DSSDBG("Framedone received!\n");
+
dsi_handle_framedone(dsi, 0);
}

@@ -3856,17 +3856,69 @@ static int _dsi_update(struct dsi_data *dsi)
return 0;
}

-static int dsi_update(struct omap_dss_device *dssdev, int channel,
- void (*callback)(int, void *), void *data)
+static int _dsi_update_window(struct dsi_data *dsi, int channel,
+ int x, int y, int w, int h)
+{
+ int x1 = x, x2 = (x + w - 1);
+ int y1 = y, y2 = (y + h - 1);
+ u8 payloadX[5] = { MIPI_DCS_SET_COLUMN_ADDRESS,
+ x1 >> 8, x1 & 0xff, x2 >> 8, x2 & 0xff };
+ u8 payloadY[5] = { MIPI_DCS_SET_PAGE_ADDRESS,
+ y1 >> 8, y1 & 0xff, y2 >> 8, y2 & 0xff };
+ struct mipi_dsi_msg msgX = { 0 }, msgY = { 0 };
+ int ret;
+
+ WARN_ON(!dsi_bus_is_locked(dsi));
+
+ msgX.type = MIPI_DSI_DCS_LONG_WRITE;
+ msgX.channel = channel;
+ msgX.tx_buf = payloadX;
+ msgX.tx_len = sizeof(payloadX);
+
+ msgY.type = MIPI_DSI_DCS_LONG_WRITE;
+ msgY.channel = channel;
+ msgY.tx_buf = payloadY;
+ msgY.tx_len = sizeof(payloadY);
+
+ ret = _omap_dsi_host_transfer(dsi, &msgX);
+ if (ret != 0)
+ return ret;
+
+ return _omap_dsi_host_transfer(dsi, &msgY);
+}
+
+static int dsi_update_channel(struct omap_dss_device *dssdev, int channel)
{
struct dsi_data *dsi = to_dsi_data(dssdev);
+ int r;
+
+ if (channel > 3)
+ return -EINVAL;

dsi_bus_lock(dsi);
+
+ if (!dsi->vc[channel].dest) {
+ r = -ENODEV;
+ goto err;
+ }
+
+ if (dsi->vm.hactive == 0 || dsi->vm.vactive == 0) {
+ r = -EINVAL;
+ goto err;
+ }
+
+ DSSDBG("dsi_update_channel: %d", channel);
+
dsi_set_ulps_auto(dsi, false);

+ r = _dsi_update_window(dsi, channel, 0, 0, dsi->vm.hactive,
+ dsi->vm.vactive);
+ if (r < 0) {
+ DSSWARN("window update error: %d\n", r);
+ goto err;
+ }
+
dsi->update_channel = channel;
- dsi->framedone_callback = callback;
- dsi->framedone_data = data;

if (dsi->te_enabled && dsi->te_gpio) {
schedule_delayed_work(&dsi->te_timeout_work,
@@ -3877,6 +3929,24 @@ static int dsi_update(struct omap_dss_device *dssdev, int channel,
}

return 0;
+
+err:
+ dsi_set_ulps_auto(dsi, true);
+ dsi_bus_unlock(dsi);
+ return r;
+}
+
+static int dsi_update_all(struct omap_dss_device *dssdev)
+{
+ int i, r;
+
+ for (i = 0; i < 4; i++) {
+ r = dsi_update_channel(dssdev, i);
+ if (r != -ENODEV)
+ return r;
+ }
+
+ return r;
}

/* Display funcs */
@@ -4095,7 +4165,9 @@ static void dsi_display_enable(struct omap_dss_device *dssdev)
{
struct dsi_data *dsi = to_dsi_data(dssdev);
DSSDBG("dsi_display_enable\n");
+ dsi_bus_lock(dsi);
dsi_display_ulps_enable(dsi);
+ dsi_bus_unlock(dsi);
}

static void dsi_display_ulps_disable(struct dsi_data *dsi,
@@ -4123,7 +4195,9 @@ static void dsi_display_disable(struct omap_dss_device *dssdev)

DSSDBG("dsi_display_disable\n");

+ dsi_bus_lock(dsi);
dsi_display_ulps_disable(dsi, true, false);
+ dsi_bus_unlock(dsi);
}

static int dsi_enable_te(struct dsi_data *dsi, bool enable)
@@ -4872,7 +4946,7 @@ static const struct omap_dss_device_ops dsi_ops = {
.enable_video_output = dsi_enable_video_output,
.disable_video_output = dsi_disable_video_output,

- .update = dsi_update,
+ .update = dsi_update_all,
},
};

@@ -4973,14 +5047,18 @@ static int omap_dsi_host_attach(struct mipi_dsi_host *host,
return -EINVAL;
}

+ dsi_bus_lock(dsi);
+
atomic_set(&dsi->do_ext_te_update, 0);

if (client->mode_flags & MIPI_DSI_MODE_VIDEO) {
dsi->mode = OMAP_DSS_DSI_VIDEO_MODE;
} else {
r = omap_dsi_register_te_irq(dsi, client);
- if (r)
+ if (r) {
+ dsi_bus_unlock(dsi);
return r;
+ }

dsi->mode = OMAP_DSS_DSI_CMD_MODE;
}
@@ -4994,6 +5072,7 @@ static int omap_dsi_host_attach(struct mipi_dsi_host *host,
dsi->ulps_auto_idle = !!(client->mode_flags & MIPI_DSI_MODE_ULPS_IDLE);
dsi_set_ulps_auto(dsi, true);

+ dsi_bus_unlock(dsi);
return 0;
}

diff --git a/drivers/gpu/drm/omapdrm/dss/omapdss.h b/drivers/gpu/drm/omapdrm/dss/omapdss.h
index 524cb87cd9ea..de4c779c358a 100644
--- a/drivers/gpu/drm/omapdrm/dss/omapdss.h
+++ b/drivers/gpu/drm/omapdrm/dss/omapdss.h
@@ -281,13 +281,12 @@ struct omap_dss_writeback_info {
};

struct omapdss_dsi_ops {
- /* bus configuration */
+ int (*update)(struct omap_dss_device *dssdev);
+
+ /* legacy API used by omapdss panels */
int (*set_config)(struct omap_dss_device *dssdev,
const struct omap_dss_dsi_config *cfg);

- int (*update)(struct omap_dss_device *dssdev, int channel,
- void (*callback)(int, void *), void *data);
-
int (*enable_video_output)(struct omap_dss_device *dssdev, int channel);
void (*disable_video_output)(struct omap_dss_device *dssdev,
int channel);
@@ -351,7 +350,6 @@ struct omap_dss_device {

const char *name;

- const struct omap_dss_driver *driver;
const struct omap_dss_device_ops *ops;
unsigned long ops_flags;
u32 bus_flags;
@@ -372,11 +370,6 @@ struct omap_dss_device {
unsigned int of_port;
};

-struct omap_dss_driver {
- int (*update)(struct omap_dss_device *dssdev,
- u16 x, u16 y, u16 w, u16 h);
-};
-
struct dss_device *omapdss_get_dss(void);
void omapdss_set_dss(struct dss_device *dss);
static inline bool omapdss_is_initialized(void)
diff --git a/drivers/gpu/drm/omapdrm/omap_crtc.c b/drivers/gpu/drm/omapdrm/omap_crtc.c
index dac9ccda98df..3068e4fffa16 100644
--- a/drivers/gpu/drm/omapdrm/omap_crtc.c
+++ b/drivers/gpu/drm/omapdrm/omap_crtc.c
@@ -362,10 +362,8 @@ static void omap_crtc_manual_display_update(struct work_struct *data)
{
struct omap_crtc *omap_crtc =
container_of(data, struct omap_crtc, update_work.work);
- struct drm_display_mode *mode = &omap_crtc->pipe->crtc->mode;
- struct omap_dss_device *dssdev = omap_crtc->pipe->output->next;
+ struct omap_dss_device *dssdev = omap_crtc->pipe->output;
struct drm_device *dev = omap_crtc->base.dev;
- const struct omap_dss_driver *dssdrv;
int ret;

if (!dssdev) {
@@ -373,13 +371,12 @@ static void omap_crtc_manual_display_update(struct work_struct *data)
return;
}

- dssdrv = dssdev->driver;
- if (!dssdrv || !dssdrv->update) {
- dev_err_once(dev->dev, "missing or incorrect dssdrv!");
+ if (dssdev->type != OMAP_DISPLAY_TYPE_DSI || !dssdev->ops->dsi.update) {
+ dev_err_once(dev->dev, "no DSI update callback found!");
return;
}

- ret = dssdrv->update(dssdev, 0, 0, mode->hdisplay, mode->vdisplay);
+ ret = dssdev->ops->dsi.update(dssdev);
if (ret < 0) {
spin_lock_irq(&dev->event_lock);
omap_crtc->pending = false;